I have a 2002 Shocker right now but i want something that shoots faster than a shocker... not that i will use it but it helps to know that you have that kind of power. anyways i was lookin at a Project Rat Impulse, but i noticed they dont come with vision. So what i would like to know is how fast do they shoot without vision and what i need to get to put the vision on i.e. what board would i need to go with vision. also is there a board for the impulse that can get it to shoot somewhere in the vicinity of 20bps? help me if you can.